Systems Administrator (Senior)

Location: Chantilly, VA | Security Clearance: Active TS or higher (Required) | Job Type: Full-Time

About the role

The Systems Administrator (Senior) provisions, configures, and maintains highly available enterprise systems while advancing automation, operational efficiency, and secure infrastructure management. This role uses Infrastructure as Code, configuration management, and automation tools to streamline administration, improve reliability, and strengthen cybersecurity posture. The Systems Administrator (Senior) also provides technical mentorship, promotes standardization, and leads system optimization initiatives across cloud, hybrid-cloud, on-premises, and multi-enclave enterprise environments.

Pay

Target salary range: $100,000 - $150,000, depending on education level, years of experience, certifications, and other position-specific requirements.

Responsibilities

System Administration and Availability

• Provision, configure, and maintain highly available enterprise systems.
• Monitor system health and resolve issues to ensure continuous availability.
• Optimize system reliability, performance, and operational stability.
• Support Windows, Linux, macOS, cloud, hybrid-cloud, and on-premises environments.

Automation and Operational Improvement

• Drive automation initiatives using Infrastructure as Code and configuration management tools.
• Use Terraform, Ansible, and related technologies to standardize and automate infrastructure administration.
• Standardize system configurations and operational procedures.
• Lead system optimization initiatives to improve operational efficiency.
• Support advanced GitLab CI/CD pipelines and DevSecOps practices.

Cloud and Enterprise Infrastructure

• Support air-gapped hybrid-cloud and on-premises operational environments, including complex multi-enclave ecosystems.
• Support AWS GovCloud, SC2S, C2S, and GCP cloud platforms.
• Configure and manage Nutanix hosts and clusters using Prism Central.
• Support Nutanix NDFS configuration and management.
• Support locally hosted GPU servers.
• Apply cloud cost-optimization techniques.
• Support Linux operating systems including Rocky Linux, Red Hat, Amazon Linux, and Ubuntu, as well as Windows and macOS.

Networking and Cross-Domain Infrastructure

• Support Cisco switching, routing, firewalling, and site-to-site connectivity, including IPsec, DMVPN, and SD-WAN.
• Support multi-tenant Cross-Domain Solutions.
• Configure and support cloud networking and VPC environments.
• Support high-assurance cross-domain and encryption solutions including TACLANE and NCAP.

Containerization and Platform Engineering

• Support containerization and orchestration using Docker, Kubernetes, and OpenShift.
• Integrate automated infrastructure provisioning and configuration into enterprise platform operations.
• Support scalable and resilient infrastructure architectures across distributed environments.

Security and Identity Management

• Implement and optimize system security controls.
• Strengthen cybersecurity posture through secure infrastructure management practices.
• Support cloud-native security implementation and security accreditation processes.
• Support identity and access services including Microsoft Active Directory, LDAP/OpenLDAP, Entra ID, and Keycloak.

Data Services and Monitoring

• Support enterprise database services including RDS, RDS Aurora, and DynamoDB.
• Support monitoring, logging, and data platforms including Elasticsearch, OpenSearch, and Splunk.
• Support system monitoring, backup, disaster recovery, and performance optimization practices.

Application Architecture and Development Support